CUSTOMARY AND METRIC CONVERSIONS USING STOICHIOMETRY 8212017 CUSTOMARY

CUSTOMARY AND METRIC CONVERSIONS USING STOICHIOMETRY 8/21/2017

CUSTOMARY UNITS OF LENGTH • 1 ft= 12 in • 1 yd= 3 ft • 1 mile = 5, 280 ft OR 1, 760 yd 1 ft 12 in (1 x 12)=12 in 1 ft 3 ft 12 in (3 x 12/1)=36 in 1 ft The unit/measurement we are converting The ratio Multiply across (there are 12 in in 1 ft) Divide the bottom number

LETS PRACTICE STOICHIOMETRY… 72 INCHES TO FEET 33 FEET TO YARDS 25 FEET TO INCHES 72 in 33 ft 25 ft 1 ft 6 feet 12 in 1 yd 11 yds 3 ft 72 -12=60 36 -12=24 60 -12=48 24 -12=12 48 -12=36 12 -12=0 33/11=3 **if it does not come out to a whole number, use repeated subtraction to get a mixed #. 12 in 300 inches 1 ft 25 x 12=300 inches

CUSTOMARY UNITS OF MASS • 1 lb= 16 oz • 1 ton= 2, 000 lbs 1 lb 16 oz (1 x 16)=16 oz 1 lb 48 -16= 32 48 oz 1 lb 3 lbs 16 oz The unit/measurement we are converting The ratio (there are 16 oz in 1 lb) 32 -16=16 16 -16=0 Division is repeated subtraction.

LETS PRACTICE STOICHIOMETRY… 24 OZ TO LB 24 oz 1 lb 1 ½ lb 3 LB TO OZ 3 lb 16 oz 16 oz 48 oz 1 lb 3000 LB TO TONS 3000 lb 1 ton 2000 lb 24 -16=8 33/11=3 3000 -2000=1000 1 lb with 8 oz left over **if it does not come out to a whole number, use repeated subtraction to get a mixed #. 1000= ½ ton 1 ½ tons

CUSTOMARY UNITS OF VOLUME • 1 cup= 8 fluid oz • 1 pint= 2 c=16 floz • 1 qt=2 pint=4 cups =36 floz • 1 g= 4 qt=8 pt=16 c= 128 floz 10 c 8 floz (10 x 8)=80 floz 1 c 9 -4=5 9 qt 1 g 2¼g 4 qt The unit/measurement we are converting The ratio (there are 4 qts in 1 gallon) 5 -4=1 One quart left over Division is repeated subtraction.

LETS PRACTICE STOICHIOMETRY… 17 CUPS TO PINTS 17 c 1 p 8½p 2 c 17/2= NOT A WHOLE NUMBER… 17 -1=16 16/2=8 +1 CUP 2 G TO QUARTS 35 FLOZ TO CUPS 2 g 35 floz 4 qt 1 g 8 qt 1 c 8 floz 4 3/8 c